population and economy continue to grow we are decreasing our carbon emissions and achieve a sustainable environment. for instance this requires all new buildings designed to meet the gas reduction goals. that means more than 6 million square feet of commercial space and 11,000 housing units all in the development pipeline have been designed using these principles. [applause] in fact san francisco was recently recognized by the world green building council as having the greenest building policy by any local level in the year 2011 and we just began implementing our existing commercial energy performance ordinance which helps private property owners lower energy use. through san francisco's program green sf we are making it easier for property owners to secure financing for green building upgrades and as can you see green buildings has become the standard rather than the exception. for our public libraries to affordable housing units, even to the home of our world series giants and their structure our buildings are achieving lead certification at a rapid pace and our san francisco public utilities com